This bulletin is essentially identical to the bulletins issued the past several years which permit certain non-ACA compliant health plans to remain in effect.
On November 14, 2013, President Obama announced that states could allow insurers to extend non-compliant coverage for policy years beginning before October 1, 2014 and they would be free from the ACA reforms. Then, in March of 2014, the Obama administration prolonged the life of these "transitional" plans to coverage renewed by October 1, 2016. These plans are now permitted to remain in effect even longer.
This means business as usual for those employers who still maintain these type of plans. President Trump has committed to "smoothly bringing all non-grandfathered coverage in the individual and small group market into compliance with all applicable" ACA requirements so this essentially buys everyone more time to sort through everything.